diff --git a/weed/filer/cassandra2/cassandra_store.go b/weed/filer/cassandra2/cassandra_store.go
index 20f068f5c..5b099eb05 100644
--- a/weed/filer/cassandra2/cassandra_store.go
+++ b/weed/filer/cassandra2/cassandra_store.go
@@ -31,6 +31,8 @@ func (store *Cassandra2Store) GetName() string {
 }
 
 func (store *Cassandra2Store) Initialize(configuration util.Configuration, prefix string) (err error) {
+	// Without this, an env-var config that omits the key drops cluster.Timeout to 0.
+	configuration.SetDefault(prefix+"connection_timeout_millisecond", 600)
 	enableHostVerification := true
 	if val := configuration.GetString(prefix + "ssl_enable_host_verification"); val != "" {
 		enableHostVerification = configuration.GetBool(prefix + "ssl_enable_host_verification")
diff --git a/weed/filer/ydb/ydb_store.go b/weed/filer/ydb/ydb_store.go
index 66a38cc0f..a5e1850b7 100644
--- a/weed/filer/ydb/ydb_store.go
+++ b/weed/filer/ydb/ydb_store.go
@@ -33,6 +33,7 @@ const (
 	defaultMinPartitionsCount     = 5
 	defaultMaxPartitionsCount     = 1000
 	defaultMaxListChunk           = 2000
+	defaultTablePathPrefix        = "seaweedfs"
 )
 
 var (
@@ -64,6 +65,7 @@ func (store *YdbStore) GetName() string {
 }
 
 func (store *YdbStore) Initialize(configuration util.Configuration, prefix string) (err error) {
+	configuration.SetDefault(prefix+"prefix", defaultTablePathPrefix)
 	configuration.SetDefault(prefix+"partitionBySizeEnabled", defaultPartitionBySizeEnabled)
 	configuration.SetDefault(prefix+"partitionSizeMb", defaultPartitionSizeMb)
 	configuration.SetDefault(prefix+"partitionByLoadEnabled", defaultPartitionByLoadEnabled)